<!DOCTYPE html>
<html lang="zh">
<head>
  <meta charset="UTF-8">
  <title>{% block title %}{% endblock %}</title>
  <link href="https://cdn.bootcss.com/twitter-bootstrap/4.1.3/css/bootstrap-grid.css" rel="stylesheet">
  <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
  <script src="https://cdn.bootcss.com/twitter-bootstrap/4.1.3/js/bootstrap.bundle.js"></script>

</head>
<body>
{% block content %}
{% endblock %}
</body>
</html>